Biological Rhythms 0.0 / 5 ? PsychologySleepA2/A-levelAQA Created by: HopeLightxCreated on: 05-05-16 13:35 Micheal Siffre (1962) Free-running study in the Southern Alps. Came up after 61 days on 17th Sept thinking it was 20th Aug. 1 of 14 Boivin et al (1996) 4 groups with reversed rhythms. very bright=advanced 5hrs, dim=drifted 1hr 2 of 14 Czeisler et al (1996) circadian rhythms can change from 13-65 hours (individual differences) 3 of 14 Duffy morning people sleep 7-10pm, night people 10-1am 4 of 14 Folkard 12 and 13 year olds read a story at 9am or 3pm. those at 3pm remembered 8% more the next week due to body temperature 5 of 14 Giesbrecht cold water study - high temperature caused better performance in cognitive tasks 6 of 14 Friedman and Fisher psychiatric patients observed over 6 hour periods, found a 90 minute rest, eat, drink cycle 7 of 14 Dement and Kleitman dreams are reported in REM sleep 8 of 14 Russel placed sweat from one female onto the top lip of another (living apart). Their mentrual cycles matched up 9 of 14 Empson studied 21 males and found a 20 day cycle in alertness and temperature 10 of 14 Morgan bred mutant hamsters with 20 hour cycles. Put their SCN in normal hamsters and found they developed the cycle 11 of 14 Darlington identified the negitive feedback loop of proteins which takes 24hrs causing the biological clock (in fruit flies) 12 of 14 Campbell and Murphy shined light on the back of ps knees to change their circadian rhythms 13 of 14 Stevens explains why women in industrialised societies develop breast cancer (melatonin disruption) 14 of 14
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